45  * FSI slave engine control register offsets
49 #define FSI_SSTAT		0x14	/* R  : Slave status */
90 	uint32_t		size;	/* size of slave address space */
140 	return fsi_slave_read(dev->slave, dev->addr + addr, val, size);  in fsi_device_read()
150 	return fsi_slave_write(dev->slave, dev->addr + addr, val, size);  in fsi_device_write()
158 	return fsi_slave_read(dev->slave, addr, val, sizeof(uint32_t));  in fsi_device_peek()
169 static struct fsi_device *fsi_create_device(struct fsi_slave *slave)  in fsi_create_device()  argument
177 	dev->dev.parent = &slave->dev;  in fsi_create_device()
184 /* FSI slave support */
185 static int fsi_slave_calc_addr(struct fsi_slave *slave, uint32_t *addrp,  in fsi_slave_calc_addr()  argument
191 	if (addr > slave->size)  in fsi_slave_calc_addr()
194 	/* For 23 bit addressing, we encode the extra two bits in the slave  in fsi_slave_calc_addr()
195 	 * id (and the slave's actual ID needs to be 0).  in fsi_slave_calc_addr()
198 		if (slave->id != 0)  in fsi_slave_calc_addr()
209 static int fsi_slave_report_and_clear_errors(struct fsi_slave *slave)  in fsi_slave_report_and_clear_errors()  argument
211 	struct fsi_master *master = slave->master;  in fsi_slave_report_and_clear_errors()
216 	link = slave->link;  in fsi_slave_report_and_clear_errors()
217 	id = slave->id;  in fsi_slave_report_and_clear_errors()
229 	dev_dbg(&slave->dev, "status: 0x%08x, sisc: 0x%08x\n",  in fsi_slave_report_and_clear_errors()
237 /* Encode slave local bus echo delay */
243 /* Encode slave local bus send delay */
249 /* Encode slave local bus clock rate ratio */
255 /* Encode slave ID */
269 static int fsi_slave_set_smode(struct fsi_slave *slave)  in fsi_slave_set_smode()  argument
274 	/* set our smode register with the slave ID field to 0; this enables  in fsi_slave_set_smode()
275 	 * extended slave addressing  in fsi_slave_set_smode()
277 	smode = fsi_slave_smode(slave->id, slave->t_send_delay, slave->t_echo_delay);  in fsi_slave_set_smode()
280 	return fsi_master_write(slave->master, slave->link, slave->id,  in fsi_slave_set_smode()
285 static int fsi_slave_handle_error(struct fsi_slave *slave, bool write,  in fsi_slave_handle_error()  argument
288 	struct fsi_master *master = slave->master;  in fsi_slave_handle_error()
296 	link = slave->link;  in fsi_slave_handle_error()
297 	id = slave->id;  in fsi_slave_handle_error()
299 	dev_dbg(&slave->dev, "handling error on %s to 0x%08x[%zd]",  in fsi_slave_handle_error()
303 	 * communication with the slave  in fsi_slave_handle_error()
305 	rc = fsi_slave_report_and_clear_errors(slave);  in fsi_slave_handle_error()
316 				rc = fsi_slave_report_and_clear_errors(slave);  in fsi_slave_handle_error()
322 	send_delay = slave->t_send_delay;  in fsi_slave_handle_error()
323 	echo_delay = slave->t_echo_delay;  in fsi_slave_handle_error()
325 	/* getting serious, reset the slave via BREAK */  in fsi_slave_handle_error()
330 	slave->t_send_delay = send_delay;  in fsi_slave_handle_error()
331 	slave->t_echo_delay = echo_delay;  in fsi_slave_handle_error()
333 	rc = fsi_slave_set_smode(slave);  in fsi_slave_handle_error()
339 				    slave->t_send_delay,  in fsi_slave_handle_error()
340 				    slave->t_echo_delay);  in fsi_slave_handle_error()
342 	return fsi_slave_report_and_clear_errors(slave);  in fsi_slave_handle_error()
345 int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,  in fsi_slave_read()  argument
348 	uint8_t id = slave->id;  in fsi_slave_read()
351 	rc = fsi_slave_calc_addr(slave, &addr, &id);  in fsi_slave_read()
356 		rc = fsi_master_read(slave->master, slave->link,  in fsi_slave_read()
361 		err_rc = fsi_slave_handle_error(slave, false, addr, size);  in fsi_slave_read()
370 int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,  in fsi_slave_write()  argument
373 	uint8_t id = slave->id;  in fsi_slave_write()
376 	rc = fsi_slave_calc_addr(slave, &addr, &id);  in fsi_slave_write()
381 		rc = fsi_master_write(slave->master, slave->link,  in fsi_slave_write()
386 		err_rc = fsi_slave_handle_error(slave, true, addr, size);  in fsi_slave_write()
395 int fsi_slave_claim_range(struct fsi_slave *slave,  in fsi_slave_claim_range()  argument
401 	if (addr + size > slave->size)  in fsi_slave_claim_range()
409 void fsi_slave_release_range(struct fsi_slave *slave,  in fsi_slave_release_range()  argument
445 /* Find a matching node for the slave engine at @address, using @size bytes
453 	parent = dev_of_node(&dev->slave->dev);  in fsi_device_find_of_node()
466 static int fsi_slave_scan(struct fsi_slave *slave)  in fsi_slave_scan()  argument
474 	 * We keep the peek mode and slave engines for the core; so start  in fsi_slave_scan()
485 		rc = fsi_slave_read(slave, (i + 1) * sizeof(data),  in fsi_slave_scan()
488 			dev_warn(&slave->dev,  in fsi_slave_scan()
489 				"error reading slave registers\n");  in fsi_slave_scan()
496 			dev_warn(&slave->dev,  in fsi_slave_scan()
497 				"crc error in slave register at 0x%04x\n",  in fsi_slave_scan()
516 			dev = fsi_create_device(slave);  in fsi_slave_scan()
520 			dev->slave = slave;  in fsi_slave_scan()
529 			dev_dbg(&slave->dev,  in fsi_slave_scan()
535 					slave->master->idx, slave->link,  in fsi_slave_scan()
536 					slave->id, i - 2);  in fsi_slave_scan()
541 				dev_warn(&slave->dev, "add failed: %d\n", rc);  in fsi_slave_scan()
584 	struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj));  in fsi_slave_sysfs_raw_read()  local
597 		rc = fsi_slave_read(slave, off, buf + total_len, read_len);  in fsi_slave_sysfs_raw_read()
611 	struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj));  in fsi_slave_sysfs_raw_write()  local
624 		rc = fsi_slave_write(slave, off, buf + total_len, write_len);  in fsi_slave_sysfs_raw_write()
646 	struct fsi_slave *slave = to_fsi_slave(dev);  in fsi_slave_release()  local
648 	fsi_free_minor(slave->dev.devt);  in fsi_slave_release()
650 	kfree(slave);  in fsi_slave_release()
676 /* Find a matching node for the slave at (link, id). Returns NULL if none
699 	struct fsi_slave *slave = filep->private_data;  in cfam_read()  local
716 		rc = fsi_slave_read(slave, off, &data, read_len);  in cfam_read()
735 	struct fsi_slave *slave = filep->private_data;  in cfam_write()  local
758 		rc = fsi_slave_write(slave, off, &data, write_len);  in cfam_write()
786 	struct fsi_slave *slave = container_of(inode->i_cdev, struct fsi_slave, cdev);  in cfam_open()  local
788 	file->private_data = slave;  in cfam_open()
805 	struct fsi_slave *slave = to_fsi_slave(dev);  in send_term_store()  local
806 	struct fsi_master *master = slave->master;  in send_term_store()
811 	master->term(master, slave->link, slave->id);  in send_term_store()
821 	struct fsi_slave *slave = to_fsi_slave(dev);  in slave_send_echo_show()  local
823 	return sprintf(buf, "%u\n", slave->t_send_delay);  in slave_send_echo_show()
829 	struct fsi_slave *slave = to_fsi_slave(dev);  in slave_send_echo_store()  local
830 	struct fsi_master *master = slave->master;  in slave_send_echo_store()
844 	slave->t_send_delay = val;  in slave_send_echo_store()
845 	slave->t_echo_delay = val;  in slave_send_echo_store()
847 	rc = fsi_slave_set_smode(slave);  in slave_send_echo_store()
851 		master->link_config(master, slave->link,  in slave_send_echo_store()
852 				    slave->t_send_delay,  in slave_send_echo_store()
853 				    slave->t_echo_delay);  in slave_send_echo_store()
865 	struct fsi_slave *slave = to_fsi_slave(dev);  in chip_id_show()  local
867 	return sprintf(buf, "%d\n", slave->chip_id);  in chip_id_show()
876 	struct fsi_slave *slave = to_fsi_slave(dev);  in cfam_id_show()  local
878 	return sprintf(buf, "0x%x\n", slave->cfam_id);  in cfam_id_show()
903 	struct fsi_slave *slave = to_fsi_slave(dev);  in cfam_devnode()  local
906 	return kasprintf(GFP_KERNEL, "fsi/cfam%d", slave->cdev_idx);  in cfam_devnode()
908 	return kasprintf(GFP_KERNEL, "cfam%d", slave->cdev_idx);  in cfam_devnode()
944 static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type,  in __fsi_get_new_minor()  argument
947 	int cid = slave->chip_id;  in __fsi_get_new_minor()
977 	return __fsi_get_new_minor(fdev->slave, type, out_dev, out_index);  in fsi_get_new_minor()
990 	struct fsi_slave *slave;  in fsi_slave_init()  local
1003 		dev_dbg(&master->dev, "can't read slave %02x:%02x %d\n",  in fsi_slave_init()
1012 		dev_warn(&master->dev, "slave %02x:%02x invalid cfam id CRC!\n",  in fsi_slave_init()
1021 	 * clock, put the slave into async mode  in fsi_slave_init()
1030 				"can't set llmode on slave:%02x:%02x %d\n",  in fsi_slave_init()
1034 	/* We can communicate with a slave; create the slave device and  in fsi_slave_init()
1037 	slave = kzalloc(sizeof(*slave), GFP_KERNEL);  in fsi_slave_init()
1038 	if (!slave)  in fsi_slave_init()
1041 	dev_set_name(&slave->dev, "slave@%02x:%02x", link, id);  in fsi_slave_init()
1042 	slave->dev.type = &cfam_type;  in fsi_slave_init()
1043 	slave->dev.parent = &master->dev;  in fsi_slave_init()
1044 	slave->dev.of_node = fsi_slave_find_of_node(master, link, id);  in fsi_slave_init()
1045 	slave->dev.release = fsi_slave_release;  in fsi_slave_init()
1046 	device_initialize(&slave->dev);  in fsi_slave_init()
1047 	slave->cfam_id = cfam_id;  in fsi_slave_init()
1048 	slave->master = master;  in fsi_slave_init()
1049 	slave->link = link;  in fsi_slave_init()
1050 	slave->id = id;  in fsi_slave_init()
1051 	slave->size = FSI_SLAVE_SIZE_23b;  in fsi_slave_init()
1052 	slave->t_send_delay = 16;  in fsi_slave_init()
1053 	slave->t_echo_delay = 16;  in fsi_slave_init()
1056 	slave->chip_id = -1;  in fsi_slave_init()
1057 	if (slave->dev.of_node) {  in fsi_slave_init()
1059 		if (!of_property_read_u32(slave->dev.of_node, "chip-id", &prop))  in fsi_slave_init()
1060 			slave->chip_id = prop;  in fsi_slave_init()
1069 			 "can't set slbus on slave:%02x:%02x %d\n", link, id,  in fsi_slave_init()
1072 	rc = fsi_slave_set_smode(slave);  in fsi_slave_init()
1075 				"can't set smode on slave:%02x:%02x %d\n",  in fsi_slave_init()
1081 	rc = __fsi_get_new_minor(slave, fsi_dev_cfam, &slave->dev.devt,  in fsi_slave_init()
1082 				 &slave->cdev_idx);  in fsi_slave_init()
1086 	trace_fsi_slave_init(slave);  in fsi_slave_init()
1089 	cdev_init(&slave->cdev, &cfam_fops);  in fsi_slave_init()
1090 	rc = cdev_device_add(&slave->cdev, &slave->dev);  in fsi_slave_init()
1092 		dev_err(&slave->dev, "Error %d creating slave device\n", rc);  in fsi_slave_init()
1103 				    slave->t_send_delay,  in fsi_slave_init()
1104 				    slave->t_echo_delay);  in fsi_slave_init()
1107 	rc = device_create_bin_file(&slave->dev, &fsi_slave_raw_attr);  in fsi_slave_init()
1109 		dev_warn(&slave->dev, "failed to create raw attr: %d\n", rc);  in fsi_slave_init()
1112 	rc = fsi_slave_scan(slave);  in fsi_slave_init()
1114 		dev_dbg(&master->dev, "failed during slave scan with: %d\n",  in fsi_slave_init()
1120 	fsi_free_minor(slave->dev.devt);  in fsi_slave_init()
1122 	of_node_put(slave->dev.of_node);  in fsi_slave_init()
1123 	kfree(slave);  in fsi_slave_init()
1244 	struct fsi_slave *slave = to_fsi_slave(dev);  in fsi_master_remove_slave()  local
1247 	cdev_device_del(&slave->cdev, &slave->dev);  in fsi_master_remove_slave()